Thanks for commenting, Mark, and sorry for the late response!

I can only imagine that this was the issue, as at times the engine used to run very slowly and it seemed to match the times when the rule wouldn't load.

We've since updated the engine infrastructure and it appears to have resolved this issue as it hasn't come back since!

Thanks,

Josh

Hi Prasanth,

Thanks for your reply, this is great news!

I presume that there is no special characters or format that I'd need to use in this case, I could simply do the following and it would work:

I would test this theory, but unfortunately our IE is heavily locked down and needs firewall rules enabling before I can test.